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Abstract <p>This paper introduced four different heat treatment processes for selective laser melting (SLM) Ti–6Al–4V titanium alloy, and the tensile properties of Ti–6Al–4V samples were investigated. All heat treatments were carried out below the β-transition temperature. The relation of different heat treatment processes and microstructure investigation based on electron back-scattered diffraction (EBSD) combination with scanning electron microscopy (SEM) and X-ray diffraction observation was discussed, and the effect of microstructures on the mechanical properties was analyzed in detail. The maximum yield strength and elongation after thermal cycling treatment are 980 MPa and 14.1%, respectively, which are superior to those reported in other literature. Experimental results showed that heat treatment spheroidization provided in this work could effectively improve the damage tolerance of SLM Ti–6Al–4V titanium alloy by increasing yield strength and tensile plasticity.</p>

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Damage Tolerance Enhancement of Selective Laser Melted Ti–6Al–4V Titanium Alloy through Heat Treatment Spheroidization

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Ze-Huan Zhang,
  • Xiao-Jiang Long,
  • Lv-Jun Zhou,
  • Long-Qing Chen,
  • Jun Zhu,
  • Xiao-Chong Liang

摘要

Abstract

This paper introduced four different heat treatment processes for selective laser melting (SLM) Ti–6Al–4V titanium alloy, and the tensile properties of Ti–6Al–4V samples were investigated. All heat treatments were carried out below the β-transition temperature. The relation of different heat treatment processes and microstructure investigation based on electron back-scattered diffraction (EBSD) combination with scanning electron microscopy (SEM) and X-ray diffraction observation was discussed, and the effect of microstructures on the mechanical properties was analyzed in detail. The maximum yield strength and elongation after thermal cycling treatment are 980 MPa and 14.1%, respectively, which are superior to those reported in other literature. Experimental results showed that heat treatment spheroidization provided in this work could effectively improve the damage tolerance of SLM Ti–6Al–4V titanium alloy by increasing yield strength and tensile plasticity.